Burglar-alarm.



PATBNTED FEB.- 27, 1908.

'3. & a. a; RODEBIGK. 311mm: ALARM. APPI-IOATIOI FILED APR 10, 1005.

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No. 813,917.. v PATENTED FEB. 27, 1906.

J. k G. G. RGDER IGK.

BURGLAR ALARM.

1221.105210]: rum) n m s.

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WITNE88E8: INVENTORS UNITED STATE S PATENT OFFICE.

JOSEPH RODERICK AND GENEVIEVE GRACE RODERICK, OF N ElV YORK, N. Y.

BUFlGLAR-ALARM.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed April 10, 1906- Seriel No. 254,850.

To all whom it may concern:

Be it known that we, JosEPn RODERICK and GENEVIEVE GRACE RonnnrcK, citizens of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Imrovement in Burglar-Alarms, of which the ollowing is a specification.

This invention relates to an improvement in alarm devices, and has special reference to burglar-alarms of a portable nature capable of and especially adapted for connection to doorknohs for sounding an alarm to warn the occupants of the dwelling or room of the attempted entrance of an intruder.

The object of the invention is to provide a cheap, simple, and neat device that is exceedingly sensitive and positive in its operation, one that may be readily attached to a door-knob, one that may be readily adjusted to an inoperative position to permit the occupants of the dwelling or room opening the door without sounding the alarm and without the necessity of removing the device from the door-knob, and also one in which a portion of the device which carries the alarm and mechanism for operating the same may be easil disconnected from the part attached to the cor and the necessity of entirely removing the whole device thereby avoided.

A further object is to provide a device of a compact nature which permits of its being carried in ones grip or pocket, thus rendering it especially adapted for the use of travelers, and still a further object is to provide a construction in which but few parts are employed and the liability of the device as a whole etting out of order thus decreased.

Wit these briefly-stated objects in view the invention comprises certain details of construction and peculiar and novel arrangement of parts, as will be fully set forth in the following specification and pointed out in the claims, reference being had to the drawings, in which- Figure 1 represents a portion of a door having our invention connected to the knobshank and showing the device set. Fig. 2 is a. similar view showing the alarm-carrying frame removed and illustrating the hanger to which the frame is connected arranged in po sition upon the knob-shank. Fig. 3 is a detail perspective view of the alarm-carrying frame of our invention. Fig. 4 and Fig. 5 are detail views of the hanger which is connected to the knob-shank. Fig. 6 is a detail view of the releasing-bar. Fig. 7 is a detail view of the escapement, illustrating the arm carried thereby which is engaged by the releasingbar. Fig. 8 is a sectional elevation of the device complete. Fig. 9 is a sectional elevation drawn on about the line 9 9 of Fig. 8. Fig. 10 is a horizontal sectional elevation drawn on about the line 10 10 of Fi .8. Fig. 11 is a detail section drawn on the Tine 11 11 of Fig. 8; and Fig. 12 is a detail view showing the releasing-bar locked, in which 'osition the escapement is locked against t 1e escapementwheel and the alarm-sounding mechanism locked against movement.

In carrying out our invention we employ a hanger A, having a hook portion A at its uper end which engages the shank of the door nob A and is securely locked against movement upon the shank by a set-screw A The lower end of the hanger is provided with a shoulder A, to which is pendulously hung the alarnncarryiug frame B. A flan e A is arranged at the outer end of the shou der A, as shown most clearly in Figs. 5 and 9 of the drawings, which prevents the frame B being accidentally disengaged from the hanger.

The alarm-carrying frame B comprises a circular lower portion B, from which extend two vertical arms 13, which are connected at their upper ends, as at B to provide a suitable portion by which the frame is suspended from the hanger. A crossbar B connects the arms about midway their length, the pur pose of which will be explained hereinafter. A plate C is connected to the lower ortion of the frame and carries an alarm D, t e alarmsounding mechanism E, including an escapement-wheel F, and an cscapement anchor or allot G, all of these last-mentioned parts hemg of substantially the same construction as now commonly employed. The escapementanchor G is provided with the usual clapperrcd and clapper G, and to the latter is connected an arm H, which extends rcarwardly through an o enin C in the plate C and thence upwardly an terminates in a flattened cont-acting end ll adapted to be engaged by the lower end of the spring-actuating releasing bar I, which is supported in the frame B and which asses through an aperture in the cross-bar 4 and also through an aperture in the lower portion of the frame down into a recess 13, provided in the lower circular portion if the frame in which also operates the arm H. A pin I projects from. the releasing-bar 1, and surrounding the latter and between the pin 1 and the lower apertured portion of the frame is a spring J, whose tendency is to normally elevate the pin and hold it from engagement with the contacting surface of the arm ll. WVhen the releasing-bar I is pressed downwardly, its lower end will contact or engage the end of the arm H and press it downwardly, which through the medium of the clapper-rod G will. throw one end of the es capement-anchor G into engagement with the escapementwheel F and lock the latter against movement, and in order to hold the parts in the position just described we provide the bar B with a central recess, which provides the shoulders B" upon either side of the same, and by turning the bar so that the pin will rest under either shoulder the releasing-bar will be held and locked in its lowermost position.

The operation of our invention is as follows: The hanger is first securely attached to the knob-shank, so that its lower portion will hang vertically, after which the frame is pendulously hung upon the shoulder of the anger and the )in I of the releasing-bar is then turned so that it is disengaged from the shoulder B, when the spring will force the bar upwardly until its upper end engages the lower portion of the han er. Now should a person turn the door-kno the hanger will be turned, but the frame will remain in avertical position, and as the knob continues to turn the lower portion of the hanger will be moved from out of engagement with the releasingbar, when the spring will immediately force the bar to its extreme uppermost position and its lower end from engagement with the arm H, carried by the clap er-arm, and thus permitting the operation of the alarm-sounding mechanism, and consequently the alarm is sounded and a warning given to the occupants of the dwelling or room.

From the foregoing it will be seen that we provide an exceedingly cheap, simple, and efficient device for the purposes stated, and it will be particularly noted that by providing the escapement-anchor with an arm which is designed to be en aged b the releasing-bar our device may e readi y locked against operation, so that the door may be opened without the alarm being sounded. It will also be noted that we provide a very sim le and convenient attachment between the angers and the frame which permits the latter being removed without the necessity of entirely disconnecting the alarm from the knob-shank.

The idea of providing a detachable connection between the hanger and the alarm-carrying frame and also a releasing-bar capable of ad ustment so that the alarm will not be sounded when the door is opened is of the greatest advantage and importance, as it is often desired to open the door after the device is adjusted thereto, which often happens, especially where children are playing about the household.

We do not claim, broadly, the idea of a hanger sup orting an alarm-carrying frame, nor do we 0 aim the alarm-sounding mechanism, as we are aware that similar devices have been patented; but our invention possesses certain improvements over the devices now upon the market, and

hat We do claim, and desire to secure by Letters Patent, is-

A device of the kind described, comprising a hanger having a shoulder portion, a frame pendulously suspended upon the shoulder, an alarm mechanism carried by the frame and. comprising an escapement-wheel and an escapement-anchor, the latter having a rod and. bell-clapper connected thereto, an arm extending from the said rod, a spring-actuated rod, carried by the frame, a pin connected to the last-mentioned rod, shoulder portions arranged upon the frame and adapted for engagement by the pin, all substantially as and for the urpose specified.

2. A device of the ind described, comprising a hanger having a shoulder portion, the outer end of which is flanged, a frame pendulously suspended from the shoulder, said frame comprising a lower circular portion having arms extending therefrom and by which the frame is supported upon the hanger, a cross-bar connecting the arms, said crossbar having an aperture vertically arranged therein and also having a recess upon its lower side by which shoulders are provided upon the bar, a rod operating through the aperture and also through an aperture in tie lower portion of the frame, a in carried by the rod, a spring surroun ing the rod and engaging a 1n and the lower apertured portion of the rame, an alarm mechanism car'ried by the frame and comprising an escapement-wheel and an esoa ement-anchor for en agement with the whee a rod having a belliammer connected to the escapementanchor, an arm connected to the rod, said arm having its free end arranged in position to be engaged by the bar carried by the frame all substantially as and for the purpose set forth.

3. A burglar-alarm comprising a hanger and frame, an alarm mechanism carried by the frame, a spring-actuated rod slidably and revolubly journaled in the frame, and engaging the hanger and escapement of the alarm mechanism, and means carried by the rod for engagement with the frame by which the mechanism may be locked against 0 eration irrespective of the movement of the rame or hanger.

4. A burglar-alarm consisting of a hanger and a frame pendulously supported from the hanger, an a arm mechanism carried by the frame, a rod slidably and revolubly held in the frame and on aging the hanger and escapement of the a arm mechanism when the alarm is set, a pin connected to the rod, a spring surrounding the rod and engaging the frame and pin, said spring being adapted to 0 crate the rod to release the esca ement W ien the hanger is disengaged from t e rod, and a shoulder formed upon the frame for engagement by the pin whereby the rod may be locked against movement irrespective of the movement of the hanger or frame.

5. A burglaralarm comprising a hanger and frame, an alarm mechanism carried by the frame, a spring-actuated rod revolubly and slidably mounted in the frame, and ada ted for locking the alarm sounding mec anism, a pin carried by the rod, a shoulder formed upon the frame for enga ement by the pin whereby the said rod may e held into engagement with the alarm-sounding mechanism irrespective of the movement of the frame or hanger.

6. A burglar-alarm comprising a hen er and frame, said hanger having a shoul er upon which the frame is held, the said frame comprising a lower circular recessed portion and vertical=extending arms connected at their n per ends, a cross-bar connecting the arms intermediate their ends, an alarmsounding mechanism connected to the sirenlar portion of the frame, an arm projecting from the escapement of the alarm mechanism and extendin into the said recess, a rod slidably and revo ubly held in the said cross-bar and lower ortion of the frame, said rod engaging the anger at one end and the arm of the escapement at its opposite end, a pin carried by the rod, a spring surroundin the rod and inter osed between the base of t e frame and pin, s oulders formed u on the cross-bar connecting the arms of the ame and adapted for en agement by the pin of the rod whereby t e said rod may be held into engagement with the said arm of the escapement irres eotive of the movement of, the hanger or sine.

JOSEPH RODERICK. GENEVIEX'E GRAGE RODERICK.

Witnesses:

M. D. BLoNnnL, E. M. VENN. 

